(21074) Rugen Main-belt Asteroid
Discovered on 12 September 1991 by Borngen, F., Schmadel, L. D. at Tautenburg.
Rügen is the largest German island in the Baltic. Off the Pomeranian coast, it is characterized by bights and sand bars. Since 1936 it was been connected to the continent by a dam 2.5 km long. The chalk cliffs Kap Arcona and Stubbenkammer are quite remarkable. The name was suggested by the first discoverer.Naming citation (20010509/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Rugen is today
Seen from above the solar system on 2026-10-14: Rugen is 2.66 au from the Sun and 1.66 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 21074 |
| Provisional designation | 1991 RA4 |
| Orbit class | Main-belt Asteroid |
| Diameter | 4.30 km (#12,054 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.182 |
| Absolute magnitude (H) | 14.28 |
| Orbital period | 3.88 years |
| Semi-major axis | 2.47 au |
| Perihelion – aphelion | 2.17 – 2.77 au |
| Eccentricity | 0.121 |
| Inclination | 7.75° |
| Closest distance between its orbit and Earth's (MOID) | 1.16 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 12 September 1991
- (6864) Starkenburg
- (9187) Walterkroll
- (9344) Klopstock
- (10782) Hittmair
- (21075) Heussinger
- (21076) Kokoschka
- (23490) Monikohl
- (24712) Boltzmann
- (24713) Ekrutt
- (27758) Michelson
- (46563) Oken
- (48456) Wilhelmwien